Bare Bones (Temperance Brennan Series #6)

It's a summer of sizzling heat in Charlotte where Dr. Temperance Brennan, forensic anthropologist for the North Carolina medical examiner, looks forward to her first vacation in years. A romantic vacation. She's almost out the door when the bones start appearing.
A newborn's charred remains turn up in a woodstove. A small plane crashes in a North Carolina cornfield on a sunny afternoon. Both pilot and passenger are burned beyond recognition. And what is the mysterious black substance cover...